Add DOI badge

[jbusecke]

Finishing touches for #72

[codecov]

Codecov Report

Merging #73 (f0d3b6f) into master (df59d46) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #73   +/-   ##
=======================================
  Coverage   97.18%   97.18%           
=======================================
  Files           2        2           
  Lines         249      249           
  Branches       71       71           
=======================================
  Hits          242      242           
  Misses          5        5           
  Partials        2        2           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update df59d46...f0d3b6f. Read the comment docs.

[jbusecke]

Hey @TomNicholas, I am getting some failing tests here. I had this situation before and a restart fixed it. Is this a quirk with hypothesis? Any chance you could check on this?
E.g. this PR does only change the README, and should not have failed?

[jbusecke]

I managed to get this to pass and will merge now. I have opened #74 to keep track of this problem.